Bio-Corrosion Resistance of Concretes Containing Antimicrobial Ground Granulated Blastfurnace Slag BIOLANOVA and Novel Hybrid H-CEMENT

Július Strigáč; Pavel Martauz; Adriana Eštoková; Nadežda Števulová; Alena Luptáková

doi:10.4028/www.scientific.net/SSP.244.57

Paper Titles

The Synthesis of α-C₂S Hydrate Substituted with Al³⁺ Ions in Mixture with CaO/SiO₂ = 1.75
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General Comment on Particle Size Analysis
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Analysis of Mixing of Particulate Material by a Single Blade
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Research of Relations between Thermodynamic Quantities of Building Materials in Connection with Heat Dissipation
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Bio-Corrosion Resistance of Concretes Containing Antimicrobial Ground Granulated Blastfurnace Slag BIOLANOVA and Novel Hybrid H-CEMENT
p.57

Surface Analysis of Plastic Materials PET by XPS Method
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Influence of High Dosage of Specific C&DW Micro-Fillers on the Fluidity of Concrete
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Steel Slag as a Substitute for Natural Aggregate in the Production of Concrete
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The Ability of Slag-Portland Cement Composites to Withstand Aggressive Environment
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Bio-Corrosion Resistance of Concretes Containing Antimicrobial Ground Granulated Blastfurnace Slag BIOLANOVA and Novel Hybrid H-CEMENT

Abstract:

The article deals with the study of biocorrosion of concretes by sulphuric acid induced by oxidizing bacteria Acidithiobacillus thiooxidans. The concretes were prepared from reference cement CEM I 42,5 N, the mixtures of CEM I 42,5 N and antimicrobial ground granulated blastfurnace slag BIOLANOVA (GGBS) (with amount of GGBS 65 mass % - CEM III/A 32,5 N, 75 mass % - CEM III/B 32,5 N, 85 mass % - CEM III/C 32,5 N a 95 mass % - CEM III/C 32,5 N) and novel hybrid cement H-CEMENT (HC). The experiments were carried out in model laboratory conditions at 30 °C during 91 days. The degree of deterioration of concrete samples has been studied on the base of the pH changes of leachate, the concentrations of selected ions such as S, Ca and Si and the mass changes. It has been clearly confirmed, that in the presence of bacteria, the pronounced degradation of the samples occurred with exception of HC sample, which behaviour proved differences to the other samples. The HC concrete possessed more alkali leachate in comparison with the others. The concentration of sulphur S in leachate was increased by metabolic activity of bacteria due to biogenic H₂SO₄ formation. The increase of S concentration acidified leachate and so promoted leaching next substances from the samples. The concentration of silicon Si in leachate was promoted by metabolic activity of bacteria, as well. The development of Ca leaching concentration has been similar at all composite samples as in the case of reference CEM I 42,5 N concrete, however the smallest portion of leached Ca has been determined at HC concrete. The Ca leaching concentration has been increasing with the amount of GGBS being added to the composite CEM III concretes. The different tendency has been also observed at the HC samples in regards to the mass changes. The increase in mass has been measured at all concrete samples with exception of HC concrete, at which the mass decrease has been found out. The results confirmed the resistance of the concrete composite samples containing GGBS and HC to the sulphate attack and the HC sample showed the highest resistance to the sulphate biocorrosion.

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Periodical:

Solid State Phenomena (Volume 244)

Pages:

57-64

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.244.57

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Online since:

October 2015

Authors:

Július Strigáč*, Pavel Martauz, Adriana Eštoková, Nadežda Števulová, Alena Luptáková

Keywords:

Acidithiobacillus thiooxidans, Antimicrobial Ground Granulated Blastfurnace Slag, Bio-Corrosion, Composite Concrete, Hybrid Cement

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